PreRequisites

A domain name provider (EPIK, etc)
A VPS provider (vultr, etc)

Set DNS Records

Get the IP of your server from your VPS provider.
Enable Reverse DNS for IPv6
Enter the IP in to the DNS system interface of you DNS provider.
- Enable IPv4 and IPv6 this way.

Server

ssh-copy-id root@domain.xyz
Edit /etc/ssh/sshd_config : UsePAM no and PasswordAuthentication no and restart ssh using systemctl reload sshd
apt update; apt upgrade and delete scetchy line from .bashrc.
install webserver stuff apt install nginx python3-certbot-nginx rsync

Website

In /etc/nginx/sites-available copy default to domainname.
Here change the root line to root /PATH/TO/WEBSITE
Change the server_name line to server_name HOSTNAME.xyz www.HOSTNAME.xyz
Copy this file to make the mail server and change root again to something relatable like root /var/www/mail.
Change the server_name to mail.HOSTNAME.xyz and www.mail.HOSTNAME.xyz
Now link both files to /etc/nginx/sites-enabled/ using ln -s /etc/nginx/sites-available/mail /etc/nginx/sites-enabled/
Create the directories with mkdir -p /var/www/domainname /var/www/mail and add a index.html to both of them.

RSYNC command

rsync -uvrP --delete-after LOCAL root@HOSTNAME.xyz:/var/www/name/

CERTBOT

Run certbot --nginx and follow the hints on the screen. It guides you quite detailed through the procedure. Make sure that in the end you select the port-forwarding.

MAIL

Use emailwiz from lukesmith.xyz/emailwiz.sh and run using internet page and replace guest.guest with domainname

Copy the output to the txt records on epik.com with mail._domainkey.HOSTNAME.xyz

Add the wanted user using useradd -G mail -m username and add password use passwd username

To enable the email to pass, you need to set the firewall correctly. Next to the ports listed below, sometimes port 25 can be probelmatic. Make sure to use ufw to open these ports and also use your VPS interface to open these ports if necessary.

Server	Protocol	Port	Handshake	Role
mail.HOSTNAME.xyz	SMTP	587	STARTLS	Outgoing
mail.HOSTNAME.xyz	IMAP	993	TSL/SSL	Incoming

Also set the MX records on you dns service provider and let it point to mail.HOSTNAME.xyz.

Possible Hickups on the way

If you had that domain already set up on a server with a different IP address, you have to clean out your local .ssh/known_hosts before you can connect using ssh.
Make sure that the config files for nginx include listen 80; listen [::]:80;, otherwise the certbot install will fail.

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